81976671

素因数分解:

$3^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:277

約数の個数: 64

約数和(自身を含む): 145152000

約数和(自身を除く): 63175329

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 71, 123, 149, 189, 213, 287, 369, 447, 497, 639, 861, 1043, 1107, 1341, 1491, 1917, 2583, 2911, 3129, 4023, 4473, 6109, 7749, 8733, 9387, 10579, 13419, 18327, 20377, 26199, 28161, 31737, 42763, 54981, 61131, 74053, 78597, 95211, 128289, 164943, 183393, 222159, 285633, 384867, 433739, 550179, 666477, 1154601, 1301217, 1999431, 3036173, 3903651, 9108519, 11710953, 27325557, 81976671]

約数ペア:

[(1, 81976671), (3, 27325557), (7, 11710953), (9, 9108519), (21, 3903651), (27, 3036173), (41, 1999431), (63, 1301217), (71, 1154601), (123, 666477), (149, 550179), (189, 433739), (213, 384867), (287, 285633), (369, 222159), (447, 183393), (497, 164943), (639, 128289), (861, 95211), (1043, 78597), (1107, 74053), (1341, 61131), (1491, 54981), (1917, 42763), (2583, 31737), (2911, 28161), (3129, 26199), (4023, 20377), (4473, 18327), (6109, 13419), (7749, 10579), (8733, 9387)]